How to Control eggplant Botrytis cinerea caused by eggplant Botrytis cinerea

Botrytis cinerea harms eggplant leaves, stems, flowers and aubergines, especially eggplant. Leaves infected, mostly in the leaf surface or leaf margin produced round or irregular brown spots, spots with alternating light and dark ring patterns, humidity for a long time gray mold. The infected stems also grow gray mold and cause rot. Floral organs infected, mainly occurred in stigma, petals, calyx and fruit stalk, infected young fruit caused by yellow brown lesions around the fruit pedicle, the surface produced gray mold, the last part of the disease rot, some eggplant fruit can fall from the disease.

Botrytis cinerea

Botrytis cinerea is a fungal disease of eggplant. Pathogens are spread by air currents, water droplets, and agricultural practices, through plant wounds, stomata, or direct invasion. The pathogen likes low temperature and high humidity. The most suitable period of disease is flowering and fruiting period. When the relative humidity is above 80%, the disease begins to occur, and when it is above 90%, it enters the peak period of disease. In general, continuous cropping, high planting density, poor management, excessive nitrogen fertilizer application and delayed ventilation are easy to cause the occurrence, spread and epidemic of diseases.

control methods

1. Cultivation and management measures: adopt high-ridge plastic film cultivation and dark irrigation and watering, and do a good job of ventilation and moisture removal to reduce the humidity of the shed; timely remove the diseased fruits and leaves, and take them out of the field for proper treatment; clean the garden after eggplant seedling pulling, and remove the diseased body.

2. Timely removal of residual petals and sepals: combined with agricultural operations, timely removal of residual petals and sepals on young fruits to block pathogen infection can significantly reduce the rate of diseased fruits.

3. Chemical control: 1500 times solution of 50% procymidone wettable powder, 1000 times solution of 50% iprodione wettable powder, 500 times solution of carbendazim wettable powder, 1000 times solution of 80% clerotium wettable powder, or 1200 times solution of 40% pyrimethanil suspension can be selected for spraying; 200- 250g of 10% procymidone smoke agent per mu or 150g of griseofen smoke agent per mu can also be adopted for fumigation in a closed greenhouse at night. The above measures are taken once every 10 days, and 2-3 times of continuous alternating medication are taken.